High system efficiency nonlinear frequency conversion on thin-film lithium niobate
Optics
2025-11-24 v1
Abstract
Integrated photonic platforms can greatly enhance the efficiency of nonlinear frequency conversion processes by tightly confining light on a sub-micron scale. However, this advantage is often reduced by large fiber-to-chip coupling losses which drastically reduce the overall performance. Here we demonstrate a highly efficient thin-film lithium niobate frequency converter based on periodically poled waveguides combined with direct laser written out-of-plane couplers. Including on-chip and fiber-to-chip losses we obtain a conversion efficiency of 152 %/W, thus demonstrating a promising approach for future scalable integrated devices.
Cite
@article{arxiv.2511.17327,
title = {High system efficiency nonlinear frequency conversion on thin-film lithium niobate},
author = {Philipp Lohmann and Daniel Wendland and Francesco Lenzini and Wolfram H. P. Pernice},
journal= {arXiv preprint arXiv:2511.17327},
year = {2025}
}